/trunk/src/sqlite/test/tkt-b72787b1.test
Unknown | 77 lines | 71 code | 6 blank | 0 comment | 0 complexity | 139a99c84c385f210cef9a126d85f715 MD5 | raw file
Possible License(s): BSD-3-Clause
1# 2011 February 21 2# 3# The author disclaims copyright to this source code. In place of 4# a legal notice, here is a blessing: 5# 6# May you do good and not evil. 7# May you find forgiveness for yourself and forgive others. 8# May you share freely, never taking more than you give. 9# 10#*********************************************************************** 11# This file implements regression tests for SQLite library. 12# 13# This file implements tests to verify that ticket [b72787b1a7] has been 14# fixed. From the ticket: 15# 16# The sqlite3ExpirePreparedStatements routine marks all statements 17# as expired. This includes statements that are not expired. 18# 19# Steps to reproduce: 20# 21# * Prepare a statement (A) 22# * Alter the schema to invalidate cookie in A 23# * Prepare a statement (B) 24# * Run B and have A run as part of B 25# * A will find a bad cookie and cause *all* statements 26# to be expired including the currently running B by calling 27# sqlite3ExpirePreparedStatements 28# * When control returns to B it will then abort 29# 30# The bug is that sqlite3ExpirePreparedStatements expires all statements. 31# Note that B was prepared after the schema change and hence is perfectly 32# valid and then is marked as expired while running. 33# 34 35set testdir [file dirname $argv0] 36source $testdir/tester.tcl 37 38unset -nocomplain ::STMT 39proc runsql {} { 40 db eval {CREATE TABLE IF NOT EXISTS t4(q)} 41 sqlite3_step $::STMT 42 set rc [sqlite3_column_int $::STMT 0] 43 sqlite3_reset $::STMT 44 return $rc 45} 46 47do_test tkt-b72787b1.1 { 48 db eval { 49 CREATE TABLE t1(x); 50 INSERT INTO t1 VALUES(1); 51 INSERT INTO t1 VALUES(2); 52 CREATE TABLE t2(y); 53 INSERT INTO t2 SELECT x+2 FROM t1; 54 INSERT INTO t2 SELECT x+4 FROM t1; 55 } 56 db func runsql ::runsql 57 set DB [sqlite3_connection_pointer db] 58 set sql {SELECT max(x) FROM t1} 59 set ::STMT [sqlite3_prepare_v2 $DB $sql -1 TAIL] 60 61 # The runsql() call on the second row of the first query will 62 # cause all $::STMT to hit an expired cookie. Prior to the fix 63 # for [b72787b1a7, the bad cookie would expire all statements, including 64 # the following compound SELECT, which would cause a fault when the 65 # second SELECT was reached. After the fix, the current statement 66 # continues to completion. 67 db eval { 68 SELECT CASE WHEN y=3 THEN y+100 WHEN y==4 THEN runsql()+200 69 ELSE 300+y END FROM t2 70 UNION ALL 71 SELECT * FROM t1; 72 } 73} {103 202 305 306 1 2} 74 75sqlite3_finalize $::STMT 76 77finish_test